Question

[3] A nutrition expert is examining a weight-loss program to evaluate its effectiveness.

Ten subjects are randomly selected for the investigation, the data are as follows:

Subject 1 2 3 4 5 6 7 8 9 10

Initial Weight 180 142 126 138 175 205 116 142 157 136

Final Weight 165 138 128 136 170 197 115 128 144 130

Is there evidence of significant weight loss?

Run the appropriate test at 5% level significance.

**USE R AND SHOW CODES**

Answer #1

Let , X=Initial Weight and Y=Final Weight

Let ,

Hypothesis : Vs

By using R : The output is given by ,

> t.test(X,Y,mu=0,,paired=T,conf.level=0.95)

Paired t-test

data: X and Y

t = 3.5887, df = 9, p-value = 0.002925

alternative hypothesis: true difference in means is greater than
0

95 percent confidence interval:

3.228755 Inf

sample estimates:

mean of the differences

6.6

Decision : Here , p-value=0.002925 <

Therefore , reject Ho

Conclusion : Hence , there is sufficient evidence of significant weight loss.

3.53 The time from when a patient is discharged from North Shore
Hospital to the time the discharged patient’s bed is ready to be
assigned to a new patient is referred to as the bed assignment
turnaround time. If the bed turnaround time is excessive, it can
cause problems with patient flow and delay medical procedures
throughout the hospital. This can cause long waiting times for
physicians and patients, thus creating customer dissatisfaction.
The admissions RN has assigned a patient...

Refer to the accompanying data set of mean drive-through
service times at dinner in seconds at two fast food restaurants.
Construct a 90% confidence interval estimate of the mean
drive-through service time for Restaurant X at dinner; then do the
same for Restaurant Y. Compare the results.
Construct a 90% confidence interval of the mean drive-through
service times at dinner for Restaurant X. nothing secless than
muless than nothing sec (Round to one decimal place as
needed.)
Restaurant X
Restaurant...

The Red Lobster Restaurant chain conducts regular surveys of its
customers to monitor the performance of individual restaurants. One
of the questions asks customers to rate the overall quality of
their last visit. the listed responses are Poor 1, Fair 2, Good 3,
Very Good 4, and Excellent 5. The survey also asks respondents
whether their children accompanied them (1=yes) and (2=no).
Graphically depict these data and describe your findings.
Customer
Rate
Children
1
4
1
2
3
2
3...

A physiological experiment was concluded to study the effect of
various factors on a pulse rate. The participants took their own
pulse. They then were asked to flip a coin. If their coin came up
head, they were to run in place for 1 minute. Then everyone took
their own pulse again. The dataset pulse.txt, available from
Moodle, contains the following variables: ROW- id numbers, from 1
to 92; PULSE1- first pulse rate; PULSE2- second pulse rate;
RAN-1=ran in place,...

3. (Lesson 11) Use Minitab Express to conduct a
chi-square test to determine if there is a relationship between
gender and whether the student said that they would prefer to win
an Academy Award, Nobel Prize, or Olympic Medal. Use the
five-step hypothesis testing procedure. [25 points]
Step 1: State hypotheses and check
assumptions
Step 2:Compute the test
statistic
Step 3: Determine the
p-value
Step 4: Make a decision (reject or fail
to reject the null)
Step 5: State a real...

Researchers in a 2015 study by Flannery et al. sought to
estimate the effectiveness of the seasonal influenza vaccine in
preventing acute respiratory infection (ARI). A total of 507
subjects from Texas who showed symptoms of ARI were recruited for
this study. The data provided show the result of each subject's
test for influenza.
Click to download the data in your preferred format.
CrunchIt! CSV Excel
JMP Mac-Text Minitab
PC-Text R ...

2. (Lesson 11) The “Year” variable represents whether
each student identified as a first-year student, sophomore, junior,
or senior. Use Minitab Express to conduct a chi-square test to
determine if the proportions of students who identify as each year
are not all equal. Use the five-step hypothesis testing procedure.
[25 points]
Step 1: State hypotheses and check
assumptions
Step 2:Compute the test
statistic
Step 3: Determine the
p-value
Step 4: Make a decision (reject or fail
to reject the null)...

Part C: Regression and Correlation Analysis
Use the dependent variable (labeled Y) and the independent
variables (labeled X1, X2, and X3) in the data file. Use Excel to
perform the regression and correlation analysis to answer the
following.
Generate a scatterplot for the specified dependent variable (Y)
and the X1 independent variable, including the graph of the "best
fit" line. Interpret.
Determine the equation of the "best fit" line, which describes
the relationship between the dependent variable and the selected...

Use the dependent variable (labeled Y) and the independent
variables (labeled X1, X2, and X3) in the data file. Use Excel to
perform the regression and correlation analysis to answer the
following.
Generate a scatterplot for the specified dependent variable (Y)
and the X1 independent variable, including the graph of the "best
fit" line. Interpret.
Determine the equation of the "best fit" line, which describes
the relationship between the dependent variable and the selected
independent variable.
Determine the coefficient of...

Historically, the MBA program at Whatsamattu U. has about 40% of
their students choose a Leadership major, 30% choose a Finance
major, 20% choose a Marketing major, and 10% choose no major. Does
the most recent class of 200 MBA students fit that same pattern or
has there been a shift in the choice of majors. Using the sample of
200 students (in the data file), conduct a Chi Square Goodness of
Fit test to determine if the current distribution...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 18 minutes ago

asked 21 minutes ago

asked 33 minutes ago

asked 38 minutes ago

asked 51 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago